Mercedes boss Toto Wolff will miss Sunday's Brazilian Grand Prix, making it the first race he has not attended since 2013, now that his team have won both Formula One championships for an unprecedented sixth year in a row. A Mercedes spokesman said technical director James Allison will be the most senior team member at the track in the Austrian's absence. "With both championships secured, it gives me more time in Europe to focus on other open topics," Wolff said in a team preview of the season's penultimate race at Sao Paulo's Interlagos track.